ok.. further investigation and respective team confirmed it is related to cookies only. Try Chrome Incognito and check the PDF. For other browsers clear cookies ...
same worked for me one affected machine.
Last week using incognito mode or using a different browser made no difference. The old file was still returned. This week using incognito mode does pull the new document. Clearing all cookies also allows "normal" mode to now work correctly as well.
I think there was indeed a server issue last week that has since been corrected, but unless the cookies are also cleared, the new document is not visible. As least things are working now. Thanks again for the help.